AL-1000, AL-1010 (serv.man14). AL1000 Electrical Section - Sharp Copying Equipment Service Manual (repair manual). Page 10

1. Outline
Fig. 4 shows the block diagram of the ASIC.
The ASIC is composed of the following three blocks; the image process section, the print control section, and the I/F section.
The image process section processes the image data from the CCD PWB according to the operation mode, such as shading, AE
process, resolution conversion. and zooming.
The print control section outputs the image-processed data during copying to the LSU (Laser unit) in synchronization with writing
timing of the LSU.
The I/F section controls communication of interface (IEEE1284) with the host PC and controls DRAM of send/receive data buffer with
the host PC. (Only for models with the printer function)
The ASIC is controlled by the CPU which writes the operation mode and the set values necessary for each operation mode to the
ASIC control register.

Scan start

CCD 
PWB

Shading

CCD drive

AE

SRAM control

SRAM 
32KB

x 

2

Resolution conversion, 
Zooming, lmage 
process circuit

Print data process circuit

DRAM control

PRINT control 

IEEE1284 control

DRAM
6MB or 4MB

LSU

HSYNC

VSYNC

To CPU bus

TO PCI/F
PWB

ASIC

Image process  section

I/F section

Print control section

ASIC control resistor

(Only for models
 withthe printer
 function)

AL-1000/1010

12-6